1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14a6082ec2249cfa3d275c65f7b8cb56943d734b4bd0255132814ab5584728b. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62939772-fbac-4595-bd20-faf0f2a60e2c.json and https://artists.proofprofile.net/proofs/artist/62939772-fbac-4595-bd20-faf0f2a60e2c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fbcefff6d9bb5d2d0a7ac1194d3da55ed880c2b0b5aa1c967246e19f063e27. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972494467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c23c4b803ca2169e4242693a578e049bb963dac85280eb8aa8e773ae490f9f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972402987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae960d5090649817216230c1f246f127df24249381096e38bf0549289a48444c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:35:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972463587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4284636ad8203d8c01b954010ed9e3f6190a5d7c8f2b3f75a5ea7d35fbf3cb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972472758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2466504b10550af3e8844b352e69bba6cc75b4d21a2e58fadad1e35120d47fc8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972472759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce7b77abae2dbafa5ed1a0ab8ad6fa89e5b4859ee4e23fb8d91f79c01b1c353. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:21:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972472760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635178d2281cb671f2d52139d1098e75dd418600d7a6d9eafc94ee19572ba111. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972472761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448e66c8ee7b5c2e3c4479cdc6632ec0293d95dc16833e4ac4f1a3b63a9688f7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ972472762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e32625e7a2929f0dd9bff819e1fa26ae29312d7ce355d10de2e29201eba6984. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA122401653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0a84dafd4710d5105a3733282049b03e52e02932f71b02227445f5c3ee7f74. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA122401855.